NAME

SYNOPSIS

DESCRIPTION

getpid() returns the process ID of the calling process. Though the ID is
guaranteed to be unique, it should NOT be used for constructing temporary
file names; see mkstemp(3) instead.
getppid() returns the process ID of the parent of the calling process.

ERRORS

The getpid() and getppid() functions are always successful, and no return
value is reserved to indicate an error.